How many different 3-digit numbers can be formed from the digits 1, 2, 3, 4 if no digit is used more than once?

Answer and explanation

Correct answer: C. 24

  1. Step 1: The order matters, so use . Step 2. . Answer: 24. Why not the others: 64: That allows digits to repeat. 4: That ignores the order of the digits. 12: That multiplies and .

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